1、求比值
0.36:0.45=0.36÷0.45=0.8
18:27=18÷27=2/3
2、化简下面各比,并求出比值
0.3:6/11
=33:60
=11:20
=11/20
1/12:3.6
=1/12:18/5
=5:216
=5/216